Images

Proposed Names

Recognized by sight: Looks to be in the badiofusca group, with thick shiny dark brown thallus. The Sonoran Flora keys it to “section four” (cortex/medulla C+ red) and “section five” (C-) based on this alone, with ~7 species in each section. Do a thin section of one of the areoles through an apothecium, and note whether the green algal layer is continuous under the apothecium; note spore size and shape, thickness of paraphyses at the base. That should be enough. We can assume that a man-made stone bridge, probably with cement involved, is calcareous — that is also critical information.

Proposed Names

Recognized by sight: Looks to be in the badiofusca group, with thick shiny dark brown thallus. The Sonoran Flora keys it to “section four” (cortex/medulla C+ red) and “section five” (C-) based on this alone, with ~7 species in each section. Do a thin section of one of the areoles through an apothecium, and note whether the green algal layer is continuous under the apothecium; note spore size and shape, thickness of paraphyses at the base. That should be enough. We can assume that a man-made stone bridge, probably with cement involved, is calcareous — that is also critical information.